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Cornerstone · Grades 3–5 Keystones #1 31 May 2024
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 May 2024 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 87 + ? = 115

    Answer: 28
  2. 2. Algebra

    What is the next term? 7, 28, 112, 448, ...

    Answer: 1792
  3. 3. Geometry

    Calculate the area of a circle with diameter 17cm

    Answer: 226.98cm²
  4. 4. Ratio

    Simplify: 8:8:12

    Answer: 2:2:3
  5. 5. Statistics

    A bag has 7 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 7⁄13

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